Instantly shields you for 1 min, absorbing x damage. While the shield holds, spellcasting will not be interrupted by damage.

Ice Barrier is a mage talent available at level 30. It shields the caster for up to 60 seconds, absorbing damage similar to a priest's Power Word: Shield spell. The shield absorbs physical, magical, and most environmental damage (fall damage is not absorbed.) Damage from DoTs such as poison is also absorbed.

Patch 1.11.0 (20-Jun-2006): Ice Barrier received an overhaul in the 1.11 mage talent review. The spell was changed to stack with Power Word: Shield (which previously overwrote it), had its cooldown reduced from 2 minutes to 30 seconds, gained the benefit of frost spell damage, and was prioritized to absorb damage before Mana Shield, thus saving mana when using both shields.